Event scheduler status:
05:12:21 UTC - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
Please help us make Percona Server better by reporting any
bugs at http://bugs.percona.com/

key_buffer_size=16777216
read_buffer_size=262144
max_used_connections=0
max_threads=153
thread_count=0
connection_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 135774 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0 thread_stack 0x40000
mysqld(my_print_stacktrace+0x2c)[0x7fb89a]
mysqld(handle_fatal_signal+0x30f)[0x6bcb0f]
/usr/lib/libpthread.so.0(+0xf870)[0x7f475efba870]
mysqld(_ZN15Event_scheduler20dump_internal_statusEv+0x40)[0x7d51f2]
mysqld(_ZN6Events20dump_internal_statusEv+0xdc)[0x63e02e]
mysqld(_Z18mysql_print_statusv+0x7af)[0x612f2b]
mysqld(signal_hand+0x5cd)[0x5142c7]
/usr/lib/libpthread.so.0(+0x80a2)[0x7f475efb30a2]
/usr/lib/libc.so.6(clone+0x6d)[0x7f475d81750d]
You may download the Percona Server operations manual by visitinghttp://www.percona.com/software/percona-server/. You may find information
in the manual which will help you identify the cause of the crash.

Tagging with pxc since it affects PXC too (for obvious reasons) and seems people are hitting it more there (may be some like to send SIGHUP at startup). Note, this is not due to mysqladmin debug (as some hypothesized in other forums) since this requires signal to be sent before the socket is open (so mysqladmin can't reach it before).

...
Event scheduler status:
15:44:26 UTC - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
Please help us make Percona Server better by reporting any
bugs at http://bugs.percona.com/

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=0
max_threads=153
thread_count=0
connection_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 342992 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0 thread_stack 0x40000
bin/mysqld(my_print_stacktrace+0x2e)[0x7bbb8e]
bin/mysqld(handle_fatal_signal+0x491)[0x6a0631]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfbd0)[0x7f9ba335dbd0]
bin/mysqld(_ZN15Event_scheduler20dump_internal_statusEv+0x28)[0x795788]
bin/mysqld(_ZN6Events20dump_internal_statusEv+0xbb)[0x638e8b]
bin/mysqld(_Z18mysql_print_statusv+0x7cc)[0x61239c]
bin/mysqld(signal_hand+0x335)[0x530c65]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7f8e)[0x7f9ba3355f8e]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f9ba2a77a0d]
You may download the Percona Server operations manual by visitinghttp://www.percona.com/software/percona-server/. You may find information
in the manual which will help you identify the cause of the crash.